公开(公告)号：US06549838B2

公开(公告)日：2003-04-15

申请号：US09681685

申请日：2001-05-21

申请人： Brian Michael O'Neil ,  John Paul Gorys ,  John Mathew Pogorzelski ,  Jacob Martin Povirk ,  Joseph Scott Slayton ,  Steven DeWayne Dunn

发明人： Brian Michael O'Neil ,  John Paul Gorys ,  John Mathew Pogorzelski ,  Jacob Martin Povirk ,  Joseph Scott Slayton ,  Steven DeWayne Dunn

IPC分类号： G06F1700

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/11 ,  B60W30/18 ,  B60W30/18045 ,  B60W30/1819 ,  B60W30/186 ,  B60W2510/0604 ,  B60W2510/0638 ,  B60W2510/0676 ,  B60W2510/107 ,  B60W2710/0616 ,  B60W2710/0666 ,  F16H59/72 ,  F16H59/78 ,  F16H61/0246 ,  F16H63/50 ,  F16H2059/088 ,  Y10T477/619 ,  Y10T477/6403 ,  Y10T477/644 ,  Y10T477/675 ,  Y10T477/688

摘要： A control strategy and method for controlling friction element engagement and disengagement time for an automatic transmission when the transmission is operating at cold ambient temperatures. During drive-to-reverse or reverse-to-drive friction element engagements with power on, the strategy compensates for a tendency of an oncoming friction element to gain capacity before an off-going clutch loses capacity, thereby avoiding a potential friction element tie-up condition when the transmission is operated with intermediate or high levels of engine torque as the friction elements are sequentially engaged and disengaged during cold rock cycling.